Improvement in furnace grate-bars



PATENT FFIC.

CHARLES TOOPE, OF NEW YORK, N. Y.

IMPROVEMENT IN FURNACE GRATE-BARS.

Specification forming part of Letters Patent No. 158,757, dated January12, 1875; application filed December 17, 1874.

To all whom it may concern:

Be it known that I, CHARLES To .PE, of the city, county, and State ofNew York, have invented a certain new and useful Improvement in FurnaceGrate-Bars, of which the following is a specification:

This invention is illustrated in the accompanying drawing, in whichFigure 1 represents a plan or top View. Fig. 2 is a longitudinalsection.

Similar letters indicate corresponding parts.

This invention consists in a grate-bar composed of two side flanges,which are connected by a series of corrugated traverses at the top, andby two or more similar corrugated traverses below, the upper traversesbeing close together, so as to form a good and even surface for the fuelwithout preventing the air to pass, in such a manner that a grate-bar isobtained which is capable of expandingand contracting without theliability of cracking.

In the drawing, the letter A designates my grate-bar, which is composedof two side flanges, a a, connected at the top by a series of traverses,b b, and below by two or more traverses, c c. All these traverses arecorrugated, as shown in Fig. 1 of the drawing, so that the gratebar canfreely expand or 'contract without danger of cracking. The uppertraverses, b b, are close together, leaving narrow air-spaces betweenthem, so that they present an even surface for the fuel withoutobstructing the passage of the air to the fire. The lower traverses, cc, simplyserve to steady the side flanges, and to retain them in theproper relation toward each other. On the outer surfacesof the sideflanges, aa, are formed a series of lugs, ef, the lugs e on one sidebeing situated opposite the spaces between the lugs f on the oppositeside. In the middle are two lugs, e e, which are situated closetogether, leaving a space which is opposite to the middle lug, f, on theopposite side, so that when two grate-bars are placed side by sidethemiddle lug, f, of one bar will catch between the lugs e e of theadjoining bar, and if the end support of one bar should burn off, saidbar will be sustained in the proper position by the adjoining bars. Atthe same time the lugs e f of one bar bear against the side flanges ofthe adjoining bars, and thereby all the bars are firmly retained inposition, and the side flanges are prevented from warping. The frontend, g, of each bar is made inclined, with a flat bottom surface, and asharp edge, h, the front end of the bar being connected with the firstcorrugated traverse by corrugated ribs i, which run in the direction ofthe side flanges, a a, so that the introduction of the fuel isfacilitated, and that the fire-bar or poker can be readily inserted.-

Bythese means a grate-baris obtained which can be made comparativelylight, which is not liable to warp or to crack, and which allows the airto pass freely to the fire, while the currents of air passing up betweenthe corrugated traverses and the side flanges serve to keep the samecomparatively cool, so as to prevent them from burning.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination, in a grate-bar for furnaces, of the side flanges, aa, the upper series of corrugated traverses, b b, and the lower seriesof corrugated traverses, c c, for steadying and strengthening the sideflanges, substantially as described, and for the purpose specified.

2. The combination, in a furnace grate-bar, of the side flanges, a a,corrugated traverses b b, and the inclined front end, q, connected withthe first traverse b by means of the longitudinal ribs i, substantiallyas described, and for the purpose specified.

In testimony that I claim the foregoing I have hereunto set my hand this12th day of December, 1874.

, CHARLES TOOPE. Witnesses:

W. HAUFF, E. F. KASTENHUBER.

